Answer / vijay chander

first we informed to respective electricity office and then
find the fault inside the VCB or E.B side. if inside the
VCB means call the person from VCB manufetures.

Answer / sskumar

Hai everybody,

Good and thanks to all of you for giving a ideas.But here
we should discuss only Technical matters not for
management.
So coming to the point, first we should cut off the
incoming supply to the VCB, how? first we should open the
AB switch, then automatically the supply wont come to VCB.
Then remove the VCB and rectify it.

Answer / gunasekaran

if we have double bus system we can close the B/C unit and
get the supply from another bus

Answer / kanand078

if DG is there run the pland at dg load..after i will check
the fault and rectify

Answer / y.hari kishore babu

first we should cut off the incoming supply to the VCB, how?
first we should open the AB switch, then automatically the
supply wont come to VCB.

Then remove the VCB and rectify the problem by vendor or
myself with help of our tecnicians

Answer / g.kumaresan.

If Main incomer fail in our site Immediatly to Isolate the
incomming supply and VCB. Bec's to protect the inside Heavy
Equipment insite in our site, then to inform the situation
in our Authoriy officer, at the same time to ensure the
back feeding arrangement, Bec's can not maintain the supply
intruption in long time.

So, doing back feeding arrangement immediatly with our
higher authrity knowledge and also other officer sugection.

Answer / anish salvi

If the incomer is further joint to transmission line Than no worry!! just Bypass the CB beacuse there are always CTs & pTS for the measurement purpose & in case if any fault occurs than even in absense of the Vaccum circuit breaker (used for 110KV and above)

Where as if it is the Distribution than use DO fuse for protection 

plz tell me about BACK emf and how it generates?

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